{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:51:07.457667", "data_source": "ERA5", "website": "http://wexa.jamstec.go.jp", "Author": "Patrick Martineau"}, "event_id": {"name": "Event ID", "description": "A unique identifier based on: beginning_date, end_date, longitude, and latitude", "value": "2023-Feb-26_to_2023-Mar-03_305.5_-24.5"}, "event_label": {"name": "Event label", "description": "Integer-valued grid identifier that uniquely labels each detected extreme event in space and time, consistent with the corresponding labels stored in the NetCDF dataset.", "value": 2023020000948}, "status": {"name": "Status", "description": "An ongoing event denotes an event that lasts up to the latest data available. These events are subject to change as newer data is added.", "value": false}, "start_date": {"name": "Start date", "description": "First date on which grid points are under the influence of an event", "value": "February 26 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 03 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "figures_available": {"name": "Figures available", "description": "True if figures were pre-generated for this event", "value": true}, "detection_var": {"name": "Detection variable", "description": "Variable used for the detection scheme", "value": "t2m"}, "event_type": {"name": "Event type", "description": "Type of the event detected", "value": "Cold spell"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 107712.76754038729}, "countries_affected": {"name": "Countries affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the countries affected by an event during its lifetime.", "value": ["Brazil", "Paraguay"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["America", "America"]}, "oceans_affected": {"name": "Ocean basins affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the ocean basins affected by an event during its lifetime.", "value": []}, "center_lat": {"name": "Center latitude", "description": "Latitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": -24.5}, "center_lon": {"name": "Center longitude", "description": "Longitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": 305.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "305.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 303.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 306.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -25.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -21.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-56.18, -22.82], [-56.15, -22.75], [-56.25, -22.5], [-56.15, -22.25], [-56.25, -22.0], [-56.03, -21.47], [-55.68, -21.32], [-55.53, -20.97], [-55.0, -20.75], [-54.75, -20.85], [-54.5, -20.75], [-53.97, -20.97], [-53.82, -21.32], [-53.47, -21.47], [-53.25, -22.0], [-53.35, -22.25], [-53.25, -22.5], [-53.35, -22.75], [-53.32, -22.82], [-52.97, -22.97], [-52.75, -23.5], [-52.85, -23.75], [-52.75, -24.0], [-52.85, -24.25], [-52.75, -24.5], [-52.97, -25.03], [-53.5, -25.25], [-53.75, -25.15], [-53.82, -25.18], [-53.97, -25.53], [-54.5, -25.75], [-54.75, -25.65], [-55.0, -25.75], [-55.25, -25.65], [-55.5, -25.75], [-55.75, -25.65], [-56.0, -25.75], [-56.53, -25.53], [-56.75, -25.0], [-56.65, -24.75], [-56.7, -24.62], [-57.0, -24.75], [-57.53, -24.53], [-57.75, -24.0], [-57.53, -23.47], [-57.18, -23.32], [-57.03, -22.97], [-56.5, -22.75], [-56.25, -22.85], [-56.18, -22.82]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.E.South-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-02-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-55.02999999999997, -23.97], [-54.5, -23.75], [-53.97000000000003, -23.97], [-53.75, -24.5], [-53.97000000000003, -25.03], [-54.5, -25.25], [-55.02999999999997, -25.03], [-55.25, -24.5], [-55.02999999999997, -23.97]]]]}, "2023-02-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-55.02999999999997, -23.97], [-54.5, -23.75], [-53.97000000000003, -23.97], [-53.75, -24.5], [-53.97000000000003, -25.03], [-54.5, -25.25], [-55.02999999999997, -25.03], [-55.25, -24.5], [-55.02999999999997, -23.97]]]]}, "2023-02-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-55.02999999999997, -23.97], [-54.5, -23.75], [-53.97000000000003, -23.97], [-53.75, -24.5], [-53.97000000000003, -25.03], [-54.5, -25.25], [-55.02999999999997, -25.03], [-55.25, -24.5], [-55.02999999999997, -23.97]]]]}, "2023-03-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-57.02999999999997, -22.97], [-56.5, -22.75], [-56.25, -22.85], [-56.18000000000001, -22.82], [-56.14999999999998, -22.75], [-56.25, -22.5], [-56.14999999999998, -22.25], [-56.25, -22.0], [-56.02999999999997, -21.47], [-55.68000000000001, -21.32], [-55.52999999999997, -20.97], [-55.0, -20.75], [-54.75, -20.85], [-54.5, -20.75], [-53.97000000000003, -20.97], [-53.81999999999999, -21.32], [-53.47000000000003, -21.47], [-53.25, -22.0], [-53.35000000000002, -22.25], [-53.25, -22.5], [-53.35000000000002, -22.75], [-53.31999999999999, -22.82], [-52.97000000000003, -22.97], [-52.75, -23.5], [-52.85000000000002, -23.75], [-52.75, -24.0], [-52.85000000000002, -24.25], [-52.75, -24.5], [-52.97000000000003, -25.03], [-53.5, -25.25], [-53.75, -25.15], [-53.81999999999999, -25.18], [-53.97000000000003, -25.53], [-54.5, -25.75], [-54.75, -25.65], [-55.0, -25.75], [-55.25, -25.65], [-55.5, -25.75], [-55.75, -25.65], [-56.0, -25.75], [-56.52999999999997, -25.53], [-56.75, -25.0], [-56.64999999999998, -24.75], [-56.69999999999999, -24.62], [-57.0, -24.75], [-57.52999999999997, -24.53], [-57.75, -24.0], [-57.52999999999997, -23.47], [-57.18000000000001, -23.32], [-57.02999999999997, -22.97]]]]}, "2023-03-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-57.02999999999997, -22.97], [-56.5, -22.75], [-56.25, -22.85], [-56.18000000000001, -22.82], [-56.14999999999998, -22.75], [-56.25, -22.5], [-56.14999999999998, -22.25], [-56.25, -22.0], [-56.02999999999997, -21.47], [-55.68000000000001, -21.32], [-55.52999999999997, -20.97], [-55.0, -20.75], [-54.75, -20.85], [-54.5, -20.75], [-53.97000000000003, -20.97], [-53.81999999999999, -21.32], [-53.47000000000003, -21.47], [-53.25, -22.0], [-53.35000000000002, -22.25], [-53.25, -22.5], [-53.35000000000002, -22.75], [-53.31999999999999, -22.82], [-52.97000000000003, -22.97], [-52.75, -23.5], [-52.85000000000002, -23.75], [-52.75, -24.0], [-52.85000000000002, -24.25], [-52.75, -24.5], [-52.97000000000003, -25.03], [-53.5, -25.25], [-53.75, -25.15], [-53.81999999999999, -25.18], [-53.97000000000003, -25.53], [-54.5, -25.75], [-54.75, -25.65], [-55.0, -25.75], [-55.25, -25.65], [-55.5, -25.75], [-55.75, -25.65], [-56.0, -25.75], [-56.52999999999997, -25.53], [-56.75, -25.0], [-56.64999999999998, -24.75], [-56.69999999999999, -24.62], [-57.0, -24.75], [-57.52999999999997, -24.53], [-57.75, -24.0], [-57.52999999999997, -23.47], [-57.18000000000001, -23.32], [-57.02999999999997, -22.97]]]]}, "2023-03-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-57.02999999999997, -22.97], [-56.5, -22.75], [-56.25, -22.85], [-56.18000000000001, -22.82], [-56.14999999999998, -22.75], [-56.25, -22.5], [-56.14999999999998, -22.25], [-56.25, -22.0], [-56.02999999999997, -21.47], [-55.68000000000001, -21.32], [-55.52999999999997, -20.97], [-55.0, -20.75], [-54.75, -20.85], [-54.5, -20.75], [-53.97000000000003, -20.97], [-53.81999999999999, -21.32], [-53.47000000000003, -21.47], [-53.25, -22.0], [-53.35000000000002, -22.25], [-53.25, -22.5], [-53.35000000000002, -22.75], [-53.31999999999999, -22.82], [-52.97000000000003, -22.97], [-52.75, -23.5], [-52.85000000000002, -23.75], [-52.75, -24.0], [-52.85000000000002, -24.25], [-52.75, -24.5], [-52.97000000000003, -25.03], [-53.5, -25.25], [-53.75, -25.15], [-53.81999999999999, -25.18], [-53.97000000000003, -25.53], [-54.5, -25.75], [-54.75, -25.65], [-55.0, -25.75], [-55.25, -25.65], [-55.5, -25.75], [-55.75, -25.65], [-56.0, -25.75], [-56.52999999999997, -25.53], [-56.75, -25.0], [-56.64999999999998, -24.75], [-56.69999999999999, -24.62], [-57.0, -24.75], [-57.52999999999997, -24.53], [-57.75, -24.0], [-57.52999999999997, -23.47], [-57.18000000000001, -23.32], [-57.02999999999997, -22.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.021214782596019}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.8405879146350324}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [23.20992782856507, 23.36477686855187, 23.898234471942544, 22.915422294813197, 22.67743022816296, 22.94933475828327]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [23.20992782856507, 23.36477686855187, 23.898234471942544, 22.063600071987196, 21.763696692139888, 21.68409616889079]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.359537770268048, -2.2616960812945877, -1.7507656968264769, -2.780874070952897, -3.025612530228325, -2.7718498847111372]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.359537770268048, -2.2616960812945877, -1.7507656968264769, -3.4370496694508574, -4.021214782596019, -3.24345465023805]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.56716698314555, -1.5470684178919405, -1.1528193795983432, -1.6815807433836585, -1.7903750655049755, -1.6709243183741482]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.56716698314555, -1.5470684178919405, -1.1528193795983432, -2.0717067747221574, -2.1361042390986524, -2.0857729524490116]}}